Hi Rafael,
Copy the .keystore file from folder
C:\Program Files (x86)\SAP\SAP Business One Integration\IntegrationServer\Tomcat\webapps\B1iXcellerator
Paste the .keystore file to folder
C:\Program Files (x86)\SAP\SAP Business One Integration\DIProxy
Restart the SAP Business One DI Proxy Service.
David Almazan